Privacy Policy
Last updated: 2026
What Highlight Hub collects and why — covering the website, extension, and API.
What we collect
- Account info: your email address, and either a password (stored as a bcrypt hash, never in plain text) or an identifier from Google/Amazon if you sign in with those.
- Highlights: the text you select and save, plus the page URL/title (or book title/author, for Kindle) it came from, and any note you attach.
- Usage state: whether a highlight is archived or liked, and when it was last shown to you, so the daily review and digest know what to resurface.
What we don’t do
- We don’t sell or share your data with third parties for advertising.
- We don’t run any analytics or ad-tracking scripts on the website or extension.
- The extension only reads page content on the tab you’re actively selecting text on, or the Kindle notebook page when you open it via the “Sync Kindle highlights” button — it doesn’t run in the background monitoring your browsing.
How your data is used
To run the product: storing and displaying your highlights, scheduling the daily review, and sending your digest email.
Where it’s stored
Your data lives in a PostgreSQL database hosted on Railway.
Deleting your data
Delete all your highlights and synced Kindle books anytime from the Danger Zone in Settings. For full account deletion, contact us below.
Kindle data
Amazon has no official API for this, so the extension reads highlight text and book titles/authors directly from read.amazon.com/notebook in your own logged-in session. We never see or store your Amazon password.
Changes
Material changes will be reflected here. Continued use means you accept them.